It's a calendar integration, how hard can it be?

Calendar sync is just the tip of the iceberg - what’s underneath is downtime, availability logic, and timezone traps. Cronofy takes care of it all behind the scenes, so your team can focus on building.

All the hard parts of scheduling, already solved

Building calendar integrations sounds simple, until your engineering team is deep in sync bugs and scheduling edge cases. Here’s what Cronofy gives you, without the build burden.

Reliability

Calendar integrations that don't break

Calendar APIs fail, providers go down, and sync bugs happen. When you build calendar integrations in-house, your team owns every outage and every missed meeting as a result.

Cronofy’s sync engine handles failures behind the scenes. It caches real-time availability, so even if providers go dark, your users can still book. With 99.99% uptime and failover logic built in, integrating Cronofy means your devs stay focused on shipping features - not fixing calendar issues.

See our status page

Speed

Support that gets you to production, fast

Building calendar integrations and scheduling features isn’t just complex, it’s slow. Development teams can spend weeks navigating calendar provider documentation, building custom logic, and dealing with edge cases.

With Cronofy, you’ll receive full support from Day 0 with a dedicated technical advisor to help you map your integration, avoid costly missteps, and accelerate time to value.

Performance

Booking experiences your users expect

When you build scheduling in-house, your app has to make multiple API calls to different providers every time a user checks availability or books a meeting. That adds latency and slows down the experience.

With Cronofy, one API call gives you real-time availability across all connected calendars - delivering faster bookings, lower latency, and a smoother experience for your users.

Can't get your head around scheduling?

Availability

Complex logic you don't need to handle

Availability logic is where DIY scheduling gets messy. Working hours, buffer times, and multi-person bookings require your developers to rebuild logic that’s harder than it looks.

Cronofy takes that complexity off your plate. You define the rules, and our API handles the rest. Whether it’s 1:1 or multi-attendee scheduling, users only see the times that work.

Learn about our Availability API

Timezones

Timezone handling that doesn't break your flow

Timezones turn even simple scheduling use cases into a mess. Daylight saving shifts, recurring events, and automatic timezone detection can create endless edge cases for your team to fix.

Cronofy handles timezone logic automatically. Our API normalizes everything behind the scenes, so your users always see accurate availability - no matter where they are, or what time of year it is.

Compliance

Compliance that keeps your users' data secure

Calendar integrations means handling sensitive data. When you build them yourself, compliance falls on your team.

Cronofy takes that off your plate. We’re GDPR, HIPAA, and SOC 2 compliant, and ISO 27001, 27701, and 27018 certified. With secure data hosting in six global regions and built-in access controls, Cronofy helps you meet enterprise requirements.

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Blog PostJune 18, 2025
Should you Build or Buy Scheduling Infrastructure?
Let's explore the pros and cons of building or buying scheduling software. Learn how third-party scheduling APIs can save time, cut costs, and enhance operational efficiency for businesses in industries like Recruitment, Telehealth, and EdTech.
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Blog PostJuly 24, 2025
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Whether you're building from scratch or using a unified API, here’s how the top Calendar APIs compare in 2025. From real-time syncing to multi-user availability and embedded scheduling, these APIs power smarter and faster user experiences across your application.
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